background-position

background-position: center;
background-position: top;
background-position: bottom;
background-position: left;
background-position: right;
background-position: top 10px left 10px;
background-position: bottom 10% right 10%;
background-position: bottom 10% center;
background-position: 10px 10px;
background-position: 10% 10%;
background-position: 10% bottom;
background-position: right 20px;
background-position: right bottom;